GitHub refers to the popular source code hosting and issue tracking service. For convenience, there is a mirror of Sage's repository on GitHub, though it should be considered read-only, and we do not accept issues or pull requests to Sage through GitHub. However, the SageMath organization on GitHub does host a number of other ancillary repositories related to Sage, and other Sage-related projects, including (but not limited to):
- Cysignals
- the Sage Patchbot
- the Sage plugin for Trac (implements features particular to trac.sagemath.org)
- the sagemath.org website
- Sage Explorer
- the (legacy) Sage Notebook
- etc...
There is also a Sage mirror on GitLab.